Elements Compounds

What is the most abundant element found in Earth's crust, or lithosphere?

• Oxygen (O)

• Nitrogen (N)

• Carbon (C)

• Silicon (Si)

What is the most abundant element found in Earth's atmosphere?

• Oxygen (O)

• Nitrogen (N)

• Carbon (C)

• Silicon (Si)

What is the most abundant element found in the biosphere, which is made up of all living things?

• Oxygen (O)

• Nitrogen (N)

• Carbon (C)

• Silicon (Si)

Which of the following is a pure substance that can be found on the Periodic Table?

• elements

• compounds

• mixtures

• none of the above

Which of the following can be separated by physical means?

• elements

• compounds

• mixtures

• none of the above

Which of the following is a pure substance that is formed through a chemical reaction?

• elements

• compounds

• mixtures

• none of the above

What does this picture represent?

• Elements

• Compounds

• Mixtures

• None of the above

What does this diagram represent?

• The element NaCl.

• A compound containing an atom of sodium and an atom of chlorine.

• A mixture of sodium and chlorine.

• A dumbbell that can be used in PE.

Elements on the Periodic Table are _____ and represented by a _____ .

• pure substances; chemical formulas

• pure substances; chemical symbol

• impure substances; chemical formulas

• impure substances; chemical symbols

How many atoms of oxygen are found in this chemical formula?

• 1

• 3

• 5

• 6